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<?php

namespace WPGMZA\Integration;

/**
 * This module integrates the plugin with the Gutenberg editor
 */
class Gutenberg extends \WPGMZA\Factory
{
    /**
     * Constructor.
     */
    public function __construct()
    {
        global $wpgmza;
        
        add_action('enqueue_block_assets', array(
            $this,
            'onEnqueueBlockAssets'
        ));
        
        add_action('init', array(
            $this,
            'onInit'
        ));
        
        if(function_exists('register_block_type'))
        {
            register_block_type('gutenberg-wpgmza/block', array(
                'render_callback' => array(
                    $this,
                    'onRender'
                )
            ));
        }
    }
    
    /**
     * Enqueues assets to be used with the Gutenberg editor
     */
    public function onEnqueueBlockAssets()
    {
        global $wpgmza;
        
        if(!is_admin())
            return;
        
        $wpgmza->loadScripts();
        
        wp_enqueue_style(
            'wpgmza-gutenberg-integration', 
            plugin_dir_url(WPGMZA_FILE) . 'css/gutenberg.css', 
            '', 
            WPGMZA_VERSION
        );
    }
    
    /**
     * Called on the WordPress init action. This function strips out JS module generated by the babel compiler, for browser compatibility.
     */
    public function onInit()
    {
        global $wpgmza;
        
        if(!$wpgmza->isInDeveloperMode())
            return;
        
        // NB: Commented out, false positives were causing this file to be wiped
        
        // Strip out JS module code for browser compatibility
        /*$filename = plugin_dir_path(WPGMZA_FILE) . 'js/v8/3rd-party-integration/gutenberg/dist/gutenberg.js';
        
        $contents = file_get_contents($filename);
        
        $contents = preg_replace('/Object\.defineProperty\(exports.+?;/s', '', $contents);
        
        $contents = preg_replace('/exports\.default = /', '', $contents);
        
        if(empty($contents))
            throw new \Exception('Gutenberg module would be blank');
        
        file_put_contents($filename, $contents);*/
    }
    
    /**
     * Called to render the plugins Gutenberg block front end.
     * @param mixed[] $atts An array of attributes passed in from the editor.
     */
    public function onRender($attr)
    {
        extract($attr);
        
        $attributes = array_merge(array('id' => 1), $attr);
        
        $str = "[wpgmza";
        
        foreach($attributes as $name => $value)
            $str .= " $name=\"" . addslashes($value) . "\"";
        
        $str .= "]";
        
        return $str;
    }
}